Fix `decode_ultihash`, Lexer regexes. 33 examples, 7 failures

lib/pigeon.rb

@@ -266,8 +266,12 @@ module Pigeon
     end
 
     def self.decode_multihash(string)
-      # "FEED.", "FILE.", "USER." etc..
-      return b32_decode(string[5..])
+      case string[0..4]
+      when BLOB_SIGIL, MESSAGE_SIGIL, IDENTITY_SIGIL
+        return b32_decode(string[5..])
+      else
+        return b32_decode(string)
+      end
     end
   end
 end

lib/pigeon/lexer.rb

@@ -56,14 +56,14 @@ module Pigeon
     attr_reader :bundle_string, :scanner, :tokens
     # TODO: Change all the `{40,90}` values in ::Lexer to real values
     # TODO: Create regexes using string and Regexp.new() for cleaner regexes.
+    ALPHANUMERICISH = /[a-zA-Z0-9_\-=\.]{1,90}/
     NUMERIC = /\d{1,7}/
     NULL_VALUE = /NONE/
-    FEED_VALUE = /USER.{52}/
-    MESG_VALUE = /TEXT.{52}/
-    BLOB_VALUE = /FILE.{52}/
+    FEED_VALUE = /USER\.[#{ALPHANUMERICISH}]{52}/
+    MESG_VALUE = /TEXT\.[#{ALPHANUMERICISH}]{52}/
+    BLOB_VALUE = /FILE\.[#{ALPHANUMERICISH}]{52}/
     STRG_VALUE = /".{1,128}"/
     # If you need other characters (but not spaces) submit an issue.
-    ALPHANUMERICISH = /[a-zA-Z0-9_\-=\.\@\&]{1,90}/
     ALL_VALUES = [
       FEED_VALUE,
       MESG_VALUE,

spec/pigeon/lexer_spec.rb

@@ -86,7 +86,7 @@ RSpec.describe Pigeon::Lexer do
     expect(hash[:DEPTH]).to eq(message.depth)
     expect(hash[:KIND]).to eq(message.kind)
     expect(hash[:PREV]).to eq Pigeon::NOTHING
-    expect(hash[:SIGNATURE]).to eq(messagenature)
+    expect(hash[:SIGNATURE]).to eq(message.signature)
   end
 
   it "catches syntax errors" do

spec/pigeon/message_spec.rb

@@ -52,7 +52,7 @@ RSpec.describe Pigeon::Message do
       "prev NONE",
       "",
       "a:\"bar\"",
-      "b:&CHHABX8Q9D9Q0BY2BBZ6FA7SMAFNE9GGMSDTZVZZC9TK2N9F15QG.sha256",
+      "b:FILE.CHHABX8Q9D9Q0BY2BBZ6FA7SMAFNE9GGMSDTZVZZC9TK2N9F15QG",
       "",
       "signature __SIGNATURE__",
     ].join("\n")